I am planning to set up camera rig, which will require 10+ cameras (preferred 20+ or "as many as possible" in spatial arrangement around the observed area. The setup will be academic, experimental, and therefore should be cheap. Image resolution should be high, but acquisition times are not critical (e.g. steady scene, not dynamic).
Currently, the most efficient way to do this seems to be the use of RaspiCams (or their even cheaper chinese clones). For this I need certain number of free CSI bus connectors, and each Raspberry Pi has only one. I am not too fond of having 30 Raspberry Pi boards, and especially don't like the hassle of 30 SD cards to manage, so my question is:
Is there an (inexpensive) way to connect many Raspberry Pi 3 Compute Modules to a single board to get 2x many CSI connectors for use with cameras? Having 15x Compute Module devkits is of course even more expensive, so this is not an option.
I know people talked about Rpi Clusters, and I perfectly understand why they are stupid idea, but is actually anyone selling some kind of a master motherboard for many Compute modules?